Nagios Support Forum

I'm using NagiosXI to monitor our SAN (Coraid) through MIBS,
we are using snmp walk to monitor and it was working until 4am this morning,
the error messages I'm getting is
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SNMP problem - No data received from host
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1. I was able to ping the server
2. checked the DNS
3. ran the following
[root@cvglobal ~]# /usr/local/nagios/libexec/check_snmp -H 10.1.100.46 -C public -o 1.3.6.1.2.1.1.1.0 -p 161 -P1
SNMP problem - No data received from host
CMD: /usr/bin/snmpget -t 1 -r 5 -m '' -v 1 [authpriv] 10.1.100.46:161 1.3.6.1.2.1.1.1.0
[root@cvglobal ~]# /usr/local/nagios/libexec/check_snmp -H 10.1.100.46 -C public -o 1.3.6.1.2.1.1.1.0 -p 161 -P2c
SNMP problem - No data received from host
CMD: /usr/bin/snmpget -t 1 -r 5 -m '' -v 2c [authpriv] 10.1.100.46:161 1.3.6.1.2.1.1.1.0
4. SAN server was running fine without any issues

We are monitoring another SAN (Coraid) and it's stable. This just appeared out of nowhere...

this might be a Coraid issue, but wanted to see if there are other debug routes I need to go through

I would tend to agree, not to point fingers, that it is likely not a nagios issue. I especially believe this since you ran the other commands and got no data back. You can always run an nmap scan and verify that the ports are open or not.